Features: Application appliances: Incubator Air conditioners, hot air curtains, dehumidifiers, dryers, dryers, heaters, for cars, etc. PTC heating element is also called PTC heater, which is composed of PTC ceramic heating element and aluminum tube. This type of PTC heating element has the advantages of small thermal resistance and high heat exchange efficiency, and is an automatic constant temperature and power saving electric heater. The outstanding feature is the safety performance. Under any application, the surface of the electric heating tube heater will not be reddened, which may cause burns, fires and other safety hazards. Three types for you to choose! Package Includes: 1x Incubator Heater Specifications: Material: Aluminum Size 1: Approx.9.5x2cm/3.74x0.79in Size 2: Approx.9.5x2cm/3.74x0.79in Size 3: Approx.8.5x8.7cm/3.35x3.43in Type: for 220V, for 110V, For 220V/12V (optional) note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.